\begin{tikzpicture} % 示意图，与所给数据无关
    \tkzDefPoints{0/0/O}
    \tkzDefPoint(205:1.5){A}
    \tkzDefPoint(335:1.5){B}
    \tkzDefPoint(240:1.5){C}
    \tkzDefPoint(40:1.5){D}
    \tkzInterLL(A,B)(C,D)  \tkzGetPoint{P}

    \tkzDrawCircle[thick](O,A)
    \tkzDrawPoint(O)
    \tkzDrawSegments(A,B  C,D)
    \tkzLabelPoints[above](O)
    \tkzLabelPoints[left](A)
    \tkzLabelPoints[right](B)
    \tkzLabelPoints[below left](C)
    \tkzLabelPoints[above right](D)
    \tkzLabelPoints[below](P)
\end{tikzpicture}

